Impact of RF Coil Characteristics on 1.5T MRI RF-Induced Heating of Active Medical Implant Leads

The purpose of this study is to quantify the extent to which different coil characteristics of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\mathbf{1. 5 T}$</tex> MRI scanners influence RF-induced lead heating of a patient with a Deep Brain Stimulator (DBS) implant. This evaluation was performed per the modeling approach of ISO/TS 10974:2018 [1] Clause 8 Tier 3, with a multitude of RF coils with different design parameters and lead heating predictions were compared. The results of this evaluation show that <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\mathbf{R F}$</tex> coil length is the most impactful design parameter on implant heating, with minor influence attributable to coil diameter and topology. A secondary outcome was to determine if a reduced set of RF coils with specific characteristics can be used instead of a full extended set to reduce time.